/*
 * jquery.simulate - simulate browser mouse and keyboard events
 *
 * Copyright (c) 2010 AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 */

;
(function ($) {

  $.fn.extend({
    simulate: function (type, options) {
      return this.each(function () {
        var opt = $.extend({}, $.simulate.defaults, options || {});
        new $.simulate(this, type, opt);
      });
    }
  });

  $.simulate = function (el, type, options) {
    this.target = el;
    this.options = options;

    if (/^drag$/.test(type)) {
      this[type].apply(this, [this.target, options]);
    } else {
      this.simulateEvent(el, type, options);
    }
  }

  $.extend($.simulate.prototype, {
    simulateEvent: function (el, type, options) {
      var evt = this.createEvent(type, options);
      this.dispatchEvent(el, type, evt, options);
      return evt;
    },
    createEvent: function (type, options) {
      if (/^mouse(over|out|down|up|move)|(dbl)?click$/.test(type)) {
        return this.mouseEvent(type, options);
      } else if (/^key(up|down|press)$/.test(type)) {
        return this.keyboardEvent(type, options);
      }
    },
    mouseEvent: function (type, options) {
      var evt;
      var e = $.extend({
        bubbles: true, cancelable: (type != "mousemove"), view: window, detail: 0,
        screenX: 0, screenY: 0, clientX: 0, clientY: 0,
        ctrlKey: false, altKey: false, shiftKey: false, metaKey: false,
        button: 0, relatedTarget: undefined
      }, options);

      var relatedTarget = $(e.relatedTarget)[0];

      if ($.isFunction(document.createEvent)) {
        evt = document.createEvent("MouseEvents");
        evt.initMouseEvent(type, e.bubbles, e.cancelable, e.view, e.detail,
          e.screenX, e.screenY, e.clientX, e.clientY,
          e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
          e.button, e.relatedTarget || document.body.parentNode);
      } else if (document.createEventObject) {
        evt = document.createEventObject();
        $.extend(evt, e);
        evt.button = { 0: 1, 1: 4, 2: 2 }[evt.button] || evt.button;
      }
      return evt;
    },
    keyboardEvent: function (type, options) {
      var evt;

      var e = $.extend({ bubbles: true, cancelable: true, view: window,
        ctrlKey: false, altKey: false, shiftKey: false, metaKey: false,
        keyCode: 0, charCode: 0
      }, options);

      if ($.isFunction(document.createEvent)) {
        try {
          evt = document.createEvent("KeyEvents");
          evt.initKeyEvent(type, e.bubbles, e.cancelable, e.view,
            e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
            e.keyCode, e.charCode);
        } catch (err) {
          evt = document.createEvent("Events");
          evt.initEvent(type, e.bubbles, e.cancelable);
          $.extend(evt, { view: e.view,
            ctrlKey: e.ctrlKey, altKey: e.altKey, shiftKey: e.shiftKey, metaKey: e.metaKey,
            keyCode: e.keyCode, charCode: e.charCode
          });
        }
      } else if (document.createEventObject) {
        evt = document.createEventObject();
        $.extend(evt, e);
      }
      if ($.browser.msie || $.browser.opera) {
        evt.keyCode = (e.charCode > 0) ? e.charCode : e.keyCode;
        evt.charCode = undefined;
      }
      return evt;
    },

    dispatchEvent: function (el, type, evt) {
      if (el.dispatchEvent) {
        el.dispatchEvent(evt);
      } else if (el.fireEvent) {
        el.fireEvent('on' + type, evt);
      }
      return evt;
    },

    drag: function (el) {
      var self = this, center = this.findCenter(this.target),
        options = this.options, x = Math.floor(center.x), y = Math.floor(center.y),
        dx = options.dx || 0, dy = options.dy || 0, target = this.target;
      var coord = { clientX: x, clientY: y };
      this.simulateEvent(target, "mousedown", coord);
      coord = { clientX: x + 1, clientY: y + 1 };
      this.simulateEvent(document, "mousemove", coord);
      coord = { clientX: x + dx, clientY: y + dy };
      this.simulateEvent(document, "mousemove", coord);
      this.simulateEvent(document, "mousemove", coord);
      this.simulateEvent(target, "mouseup", coord);
    },
    findCenter: function (el) {
      var el = $(this.target), o = el.offset();
      return {
        x: o.left + el.outerWidth() / 2,
        y: o.top + el.outerHeight() / 2
      };
    }
  });

  $.extend($.simulate, {
    defaults: {
      speed: 'sync'
    },
    VK_TAB: 9,
    VK_ENTER: 13,
    VK_ESC: 27,
    VK_PGUP: 33,
    VK_PGDN: 34,
    VK_END: 35,
    VK_HOME: 36,
    VK_LEFT: 37,
    VK_UP: 38,
    VK_RIGHT: 39,
    VK_DOWN: 40
  });

})(jQuery);
